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seen Oct 24 '13 at 6:08

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Jul
29
accepted Should we simplify or not for function domain?
Jul
29
asked Should we simplify or not for function domain?
Jan
15
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Oct
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accepted Grouped data median, using lower class limit or lower class boundary?
Oct
4
answered Grouped data median, using lower class limit or lower class boundary?
Sep
19
comment Grouped data median, using lower class limit or lower class boundary?
Yes, I know that it is an estimation. Even there is some resources mentioned using the mid-point of the class. I just wonder why isn't there a standard explanation for the formula, or which one is the most reasonable, or which one is used in research.
Sep
19
comment Grouped data median, using lower class limit or lower class boundary?
If the class is something like 1-5, 6-10, 11-15, then lower class boundary is 0.5 for the first class, and lower class limit is 1. If the class is something like 0<x<=5, 5<x<=10, 10<x<=15, then lower class boundary for the first class is 0, and lower class limit is also 0.
Sep
19
asked Grouped data median, using lower class limit or lower class boundary?
Sep
9
accepted What is the correct way to plot histogram?
Sep
8
comment What is the correct way to plot histogram?
Gary, thanks. But the relative frequency is only make the total into 1.00. It seems like nothing related to the width of the class size.
Sep
7
revised What is the correct way to plot histogram?
added 434 characters in body
Sep
7
comment What is the correct way to plot histogram?
But based on the source like wikipedia, it mentions that the frequency is equal to the area of the bar. Meaning that, for the class [20,39), it should be 2.0 or 20, since the class is twice wider than the first two classes. But the problem is, the vertical axis now should be label as "frequency" or "frequency density"?
Sep
7
revised What is the correct way to plot histogram?
Giving example for the question
Sep
7
awarded  Student
Sep
7
asked What is the correct way to plot histogram?